A lot of times you get that effect by tilting the camera up and getting more bright sky. Here's (above) a picture emphasizing the ground...
...and here's (above) a slightly different one which includes the sky. The composition isn't nearly as appealing as the previous one but it makes my point about using the sky to add another bright element. I wish I could use my own pictures to illustrate this but they're all of my family and they get mad whenever I attempt to post pictures of them.
I like the way old black and white films use white. Somebody always gets the white shirt even if they're cowboys on the range. It helps the composition.
Or a white blouse.
On another subject, I hate commercial portrait photography. Mall-type photographers are always trying to use Rembrandt lighting and it looks terrible. The guy above is just too stark and three-dimensional. You can see every pore. Rembrandt pictures work best when the camera's at a distance and can flatten the subject out. Mall pictures are always taken in cramped spaces where the photographer's only a few feet away. Besides, not every face is appropriate for that kind of treatment.
I don't like this picture (above), but it's a slight improvement on the previous one. It's flatter at least, and the color isn't as jarring.
Maybe I'm giving the wrong impression by mentioning flat so often. I only use flattening long lenses for special pictures. Flat pictures with out-of-focus backgrounds killed the old Life Magazine. Maybe I'll do a blog on that one of these days.